The best time to visit Yen Bai is typically during the dry seasons, from March to May and September to November, when the weather is most agreeable for exploring.
The period from March to May offers pleasant temperatures and less rainfall, making it ideal for outdoor activities like trekking and visiting the terraced rice fields. The fields are often green and lush during this time, especially in areas like Mu Cang Chai, which is known for its stunning landscapes.
For those interested in experiencing the harvest season, September to November is an excellent choice. The rice terraces turn a beautiful golden colour, offering incredible photo opportunities. The weather remains relatively dry and comfortable, superb for leisurely drives through the countryside and enjoying the local culture.